Pump jack



- March 15,1927. 1,620,795

I L. J. BLACK v PUMP JACK Filed Aug. 24, 1926 3 Sheets-Sheet. 1

q Q wmava; M m H. 3 g 'M WN v v1 w 3 13 v 1,6207 March 15,1927. L'J. BLACK v ,95

PUMP JACK I v Filed Aug. 24, 192s 3 Sheets-Shee+ 2 March 15-, 1927. ,620,795

L. J. BLACK PUMP JAcK Filed Aug. 24, 1926 s Sheets-Shet rs its a g LEE J. ianecnyori Bean-nonlinear.

rmvrr men-$- Application'fi led August 24,1926." SeriaIENo: 133251.

invention relatesto improvements in pumping-machinery and particularly to the so calledipump, jacks for operating; the P0]: ishedtrodsrused inconnection with oilwell pumpingiapparatus. Y v

The principal objectsof the invention may be briefly summarized'as follows;

First, it aims toprovide av pump. jack structure wherein the idlepulley or sheave supporting. mast is designed tonbeswung backwardly to entirely clear the casingqhead of. the well: so; asto; permit thefree use of the derrickr and hoisting tackle, I when, it v is Y necessary v to pull rods or tubing from the Secondly, -,to furnish aedevice of this character wherein-1a:- single or duplicate connection may be employed .forengagement: to and manipulation of the polished (rod, the same being. either chains; or cables orthe like-,;.and which 5 may be employed with% a pump jack of .the type including a counter.- Wei hi7. i

T- irdly,:theprovisionpof a; novel and im proved ipowenwheel '2 havinggmeans whereby its-operatingcableorjack line may be-attached in such fashion as toproducefla smooth uniform pull-on. the wheel throughout its: stroke,.this jack. line attaching meansr beingsadjustable whereby, the length of stroke;- ofgthe power wheel and pump may be variedwith respect to the length of stroke of. theticrank" or; cam which-operatesthe jack line. p

Other obj ectsand advantages of: the inventionwill be mentioned or will be readily I apparent Zl-Svathfi description proceeds. Y

The various features of'novelty; which characterizemy pump-jack; are;p ointed o'ut withparticularity intheclaims annexed to and forming: a part of this specification. However; for a :better understanding; of the improvements and their advantages refer1 encenshould be had; to the, accompanying drawingjsrand descriptive ;m at te r depicting what I, now regard as Ia-,preferred1embodimenta'ofpthe invention. Itisto be under-' stoodof-courseyth'at the, disclosure herein ,is r

in no; wise limitative and that} I am entitled to make such changesand modifications ;-in

' the apparatus shown aslfairly fall; within the spirit: and

In the drawingsa scope of: the; invention@ as igure 1 I isna, perspective view of-the in vention: in operative position and illustrat with bearings-12 towreceive; the ;-pi n'tles 1. 3"?

of the sprocket-Fpulley- 13; The chain-:14,

Figure 6 is aside. elevation: of-ithe power Wheel; illustrating the use of duplicate ca b'le' conlnecti'ons for engaging the polished r'o'dganc Y in Figures 6 and "Z illustrate; two forms of mast sheaves: which-mayubewemployed when the duplicate cable arrz'ljn'gement of Figure disused; Referring specifically; to the drawings; wherein like reference characters designate the .same parts. throughout the severalnviews,

the apparatus comprises a 1 frame iincluding a ;pair of spaced il-be'ams ;1 connected iniany desired way such 1 aSvby'y crossflmembers Y At one end of (the frameyare Q provided- V'- shaped; supporting standardsv2; with; transverseesockets 2 at-their ;apices f0r the reception of the. shaft of-"thegsegmental ,poWe-r wheel 4, An anti-frictionroller"bearing;-5 is provide'dqfor-t-wheel 4; as shown in Fig: 8, set collars 6 engaginggthe lIU'bwendSHOf the wheel 4eito hold Litagainst end playa, Fig. 1 clearly illustrates thatlshaft t3=is held station? ary-i-nw sockets -2 jby; cotter -pins 7 WlIlOlLeX- ten'detransversely through. each: SOCkBtWHHCl the shaft 1 I Atlthe-other end+of the "frame is; mounted the sheave or pulley supporting mast com; prising spaced uprights E8ttlf6rlOW6I16IldSyQf whichc-are bolted as at 82.;to the isides of the medial I boss 5 9 ofqthei foot .{casting;;-9* rwhose pintles 9 are .secured in bearing boxesy'lO mounted uponthe frame/ Itisksee nzth at the mast is sWingi-ngly; mounted on the frame,

this, construction enabli:r1 t it'ato be; swung cleariof the well, hole "when it isvdesired-ito p ll tubingior: rods as Wlll'; be".more *fully explainedhereinafter.'

, At their supper, i ends; the -mast sections ;-8- carrycap castings 11, the same being-formed which1 -is driven {in the-gwell-pknownr:recip tO-T' catory,--fashion'%:by;p;ovver@wheel l' isytnained 1 '1 1 L. i at. N 11 EELQE no i to the polished rod 15 as indicated at 16,

the polished rod 15 working through the.

casing head 17 of the well in the usual manner.

The mast is held in vertical position by means of an adjustable brace in the form of a rod 18 whose T head 19 at one end is pivotally supported on a short shaft 20 carried by the uprights 8. The T head 19 is socketed to receive the rod 18 and a detachable connection is established by means of a bolt or pin 21 insertable through alined holes in the socket and rod as indicated in-Fig. 2. The other end'of the rod 18 ispivoted as at 18? to a plunger element 22 working in the forwardly slanting or obliquely disposed socketed casting 23 which is bolted to one of the cross members 1.

The socket casting 23 is slotted as indicated at 24. to receive a pin 25 projecting laterally from the plunger 22. The end of the pin 25 is-adapted to engage in recesses within the socket whereby to hold the mast in its operative or inoperative position. It is understood that the rod 18 is designed to slide into the socket casting 23 as indicated in dotted lines in Figure 2. j

The very important advantage of my construction, just described, is that it enables the mast to be swung entirely clear of the casing head 17 so as to permit the'rods or tubing to be pulled without hindrance by meansof-aderrick and tackle as mentioned in the introductory part of this specification. With pump jacks of the type commonly used it is necessary to dismantle or take down the mast in order to get it out of the way when it is desired to pull tubing. The only other alternative is to move the apparatus away from thecasing head and this is a rathertedious task. I Referring again to the power wheel 4 it is noted that its periphery formed at either side with a circumferential groove 4 while between these grooves is a sprocket toothed segment 4 coextensive with the periphery of the wheel. The polished rod operating chain 14 previously mentioned is trained over the sprocket teeth 4 and the end of this chain is secured to a cross pin 26 carried'bylthe wheel, as shown in Fig. 2.

Figure 1 illustrates that one of the grooves 4 is designed to receive a cable 27 which is fastened to the wheel as at 27 and has its free end suspending a counterweight 28 which works in a hole in the ground between the two -I-beams 1. The function of the counterweight is to partially compensatev for the weight of the rods in the well so as to relievethe wheel 4 of a certain amount of strain and lessen the force requisite to However, it is of course to inthe'well will be suificiently in excess of the weight of the counterweight 28 to lift the same on the return or drop of the rods in the normal well known operation of the device, 1 Referring to Fig. 3 it is observed that th wheel'4 is hollow, that is it comprises spaced supporting webs 4 for the rim or felly. These webs 4 are each provided with four series of diametrically opposite holes A, B,

C and I). There are three holes ineach series and each hole thereof is the same dis tance from the center of the wheel. The series of holes A, B and C are designed to receive the pintles of rollers 28. The jack line J is connectedto the wheel 4 by means of a pin 28 selectively engageable in any one of the diametrically opposite holes of the web sections 4 there being a pair of these holes in proximity to each series of holes A, B, C and D.

It is evident that by the useof the rollers 28 positioned in any one of the series of apertures or holes A, B, C and D that the pull on the wheel 4 will be uniform throughout its stroke by reason of the factthat the holes of each series are-equidistant from the center of the wheel 4. This is an important featurebecause in the structures'nowused the pull of the jack line is uneven. By way ofexplanation it is pointed out that whena jack line is connected to a power wheel solely at one point and without auxiliary support for the line the point of connection is very close to the center o f the wheel at the commencement of the stroke. This results in a decided thrust against the shaft of the power wheel, it being understood thatthe line of pull of the jack line is so as to speak in a straight line. Likewise the speed of rotationof the power wheel is going to vary during the stroke according to the distance the jack line attachment is from the axis of the wheel during the various stages of the stroke.

The adjustable rollers 28 further permit the'stroke of the power wheel 4 to be varied relative to the stroke ofthe cam or crank (not shown) whichoperates the jack line ,l'. The stroke of this cam or crank for operating the jack line is of course uniform and. is usually anywhere from-2O to 24 inches. Assuming that the rollers 28 are located in the series of holes A, the pumping stroke or extent of travel of the periphery of the wheel 4 would be nearly twice the length of the stroke of the jack line J and its cam or crank. When the rollers 28 are located in the holes B the relative length of the pumping stroke and extent of travel of the rim of wheel 4 will be somewhat less than when the rollers were located in the holes A. I In. other words, the jack line stroke being constant, the peripheral movement of the wheel 4 will decrease as the rollers 28 and point of jack 0 ea'edgeea came-man basem nts satiat on peiishea portantto-be able to change the'punip streke as-the desirable- 1engeh ost-reke will var y' accordin'gto tlie depth of the well'aagridtother circumstances; i I

when punipingapa ticularly deep wells; it isoften desirableete supporethe' olislied rod blemonmetidm In apparatusthis is possible, without changifig thefwheel iror terially' alteri'ngrthe- Sana-amp arrangenient of the device Two cable's"areponn'ected inthe-grooves 42fa'sf clearlyshown imihga 6" .while the -clraiin 14? of Figl- 2ibecomes the be ci-esaeeieyeaea iy -e peiiey 3% (Fig; 8)

- power wheel 4 having marginal cabl' 'grooves 37 and an intermediate sprocket? toothed section 37B. Thispulley could be used with either: achaiii or 'dliplicate cable connection between power wheel 4 and polished rod 15.

' Having thus described the invention,what is claimed is:

1. A pump: jack comprising a. frame, a power wheel journaled upon said frame, a mast swingingly mounted upon said frame and having apulley journaled thereon and positionable over the well casing head, a flexible polished rod operating connection trained over said pulley and driven by said power wheel, an adjustable brace for said mast whereby the mast may be swung from its operative position to a point clear of the casing head, said power wheel including spaced rim supporting web sections, a reciprocatory jack line for operating said power wheel, and variably positionable means carried between saidWeb sections for connectiiig said line to the wheel at various points with respect to its axis. f

2. A pump jack comprising a frame, a power wheel, journaled upon said frame, a mast swingingly mounted upon said frame and having a pulley journaled thereon and positionable over the well casing head, a flexible polished rod operating connection trainedover said pulley and: driven by said power wheel, an adjustable brace for said mast whereby the mast may be swung from its operative position to a point clear of the casing head, said power wheel including spaced rim supporting web sections, a reciprocatory jack line for operating said power wheel, and variably positionable means carried between said web sections for support-.

ing said line during its working stroke and maintaining the same a uniform distance from the. i of the Wheel 'tliro'ughou-t saidi Sui-eke" r 3; A pump jack-i comprisingta frame; a

power wheel o-u'rria-ld upon said frame, an mast sw ngingly mounts-a upon saidframe and lraving a pulleyj ourna-led thereon and positionable over the well casing head, a

flexible polished rod operatin'gconne'ction trained over A said pulley and driven by said mas-t whereby the mast may beswungfrom its operative position to a point clear of the} casing head;- said power" wheel including"- spaced riin supportingweb: sections, areap roeater jaeleiin for operating said power wlieelfsupporting rollers for said flin'e dispose'cbbetween" said web' sections'an d ar ranged iii"ai'cualseries equidistant from the axis of the wheel, and said rollers beingva ria bly' positionable with; respectto the axis of the wli'e'elwhereby the'ystroke of? the;

wheel .in'ay: be varied withfrespect to the a wheel, variably positionable means carried between said vweb sections for supporting.

said line during its working v stroke and.

maintaining the same a uniform distance from the axis of the wheel throughout said stroke, the periphery of said power wheel having attaching and guiding means for said aforementioned connection, a counterweight carried by said wheel, a flexible connection for I supporting said counterweight, said wheel periphery having guide means for an auxiliary connection to be attached to the polished rod.

5. In a pump ack, a power wheel com-, prising spaced web sections, the web sections having several radially spaced and diametri- ,cally opposite series of transverse apertures,

the apertures-of each series being on thesame radii, rollers positionable between said webs and having theirpintles selectively engageable in the respective series of apertures,

a reciprocatory jack line for oscillating said power wheel and adapted to work over said rollers in any of the several settings thereof, and said power wheel having meansfor' connection with said jack line at points adjacentithe ends of each of said series o-f apertures. 1 I

6. In a pump jack, a power wheel comprising spaced web sections defining a substantial recess between the hub of the wheel and its rim, a reciprocatory jack line for operating said wheel, antifriction elements over which said jack line works, and means for selectively mounting said antifriction elements between said webs in arcual series at radially spaced points. 1

7. In a pump jack, a power wheel comprising spaced web sections defining a substantial recess between the hub of the wheel and its rim, a reciprocatory jack line for operating the wheel, means positionable between said webs for supporting said jack line equidistant from the center of the Wheel throughout its working stroke, and means for variably positioning said jack linesupporting means with respect to the center of the wheel. 1

8. In a pump jack, a power wheel comprising spaced web sections defining a substantial recess between the hub of the wheel and its rim, a reciprocatory jack line for operating the wheel, and means positionable between said webs for supporting said jack line equidistant from the center of the wheel throughout its working stroke.

9. In a pump jack, a power wheel, a reciprocatory jack: line for operating the same, anti-fricti on means for supporting said line the same distance from the center of the wheel throughout its working stroke, and

said wheel having means whereby said line supporting means may be variably positioned withrespect to the axis of the wheel.

10. In a pump jack, a power wheel comprising spaced web sections defining a sub tions for supporting a jack line equidistant from the axis of the wheel throughout its movement, and the rim of said wheel extending entirely across, the space betweensaid web sections to thereby provide a relatlvely broad periphery, and guide means formed upon the periphery of said rim for a plurality of flexible connections, said guide means in eluding a series of sprocket teeth and a pair of grooves.

In testimony whereof I affix my signature.

LEE J. BLACK. 

